Improvement in alars



GEORGE JACOB SWINGLE, OF DAVENPORT, IOWA.

`|inPaci/ErwENQ-r' in ALARM-Locks.

Specification forming part of Letters Patent No. 123,305, dated J annary 30, 1872; antedated January 29, lS'Q.

T o all whom it may concern:

Be it known that I, GEORGE J. SWINGLE, of Davenport, in the county ot' Scott and State of Iowa, have invented a new and Improved Combined Anti-Burglar Door- Lock, Burglar-Alarm, and Door-Bell, which is fully described in the following specification and accompanying drawing', in the diii'erent figures of which like letters represent like parts ot' the invention- Figure l being an inside view of the door with lock, door-bell, and burglar-alarmattached; Fig. 2, a section ot' the door above the lock, as indicated by line x of Fig. l, snowing the top edg'e ot' the lock and knobs attached; Fig. 3, a section of the knob-rod, as indicated bythe line y y of Fig. 2; Fig. 4, view of night-key; Fig. 5, view ot' end ot' da-ykey, showing pin on 'the inside; Fig. 6, a section ot' night-key, showing the pin and handle.

Nature.

The nature of my invention consists of a key constructed to tit over a sleeve encompassing the knob-rod and provided with a pin to fit in a hole ofthe rod; also, in the arrangement of a door-lock or catch and alarm-bell and the various devices connecting therewith; all so arranged that the door cannot be opened without ringing the bell, as will be hereinafter more fully explained and claimed in the second clause.

The knobs are attached on the ends of a round rod which passes through and turns loosely in a hollow shaft or sleeve, the surface of which is made square, and is arranged to connect in the usual manner with the lockbolt, and is operated by a key made to slip over the end ofthe sleeve, and provided with a pin to t in a hole in the knob-rod, by means of which the lock-bolt is opera-ted. A spiral spring is arranged on the inside end ot the knob-rod to spring the knob back when the door-bell is rung, the bell being connected with the knobs by proper wires.

The burglar-alarm consists of an ordinary clock-alarm attached to the inside of the door and connected by proper wire and droplever with a notched wheel on the inside end of the knob-rod.

A represents a common door-lock or catch with a single bolt, b, which is nia-de in two parts, so that the front end may be reversed to change it from a right-hand to a left-hand lock. The knobs B B are attached on the ends ot'a. round rod, O, which passes through and turns loosely in a hollow shaft or sleeve, l), as shown in Figs. 2 and 3. E represents the bell, Iand F the alarm-gearing, similar to an ordinary alarm-clock gearing. Gr is a wire connecting with the gearing and with a droplever, H, which rests upon the notched wheel K on the inside end ot' the knob-rod. L represents the devices for ringing the door-bell, which are connected with the door-knob by a lever, M, arranged so that the end bears against the inside ot' the knob B', as seen in Figs. l and 2. N represents a lever provided with a knob attached to the end of sleeve 1) fortnrning back the door-catch on the inside; and P is a dead-latch, made to t over the square surface of the sleeve D for locking the door. It represents the key, made the proper size and sha-pe to lit over the end of the sleeve D, and provided with a pin, c, on the inside to tit 1n ahole, c', in the knob-rod. (See Figs. 2, 3, and 5.) R represents the same key provided with a longer handle, and designed to be used as a night-key. S represents a spiral spring arranged upon the inner end of knob-rod to spring the knob back when drawn out to ring the door-bell. The wheel K is fastened upon the rod O, and is provided with two notches in such positions as to form the narrow and wide sections d d.

When the alarm devices are arranged for use the knob is turned so that the drop-lever H rests upon the narrow section d, in which position the key cannot be inserted and the knob turned sutciently to throw back the bolt b without springing the alarm. When the alarm is not required to beused the knob is turned so that the lever H rests upon the wide section d', in which position the key may be inserted and the bolt thrown back without ringing the alarmbell.

Thesmall key shown in Fig. 5 is designed for day use, and the other key, shown in Fin'. 4, for night use, because in the dark it can be more readily inserted, or, if dropped, can be more readily found. To insert the key the front knob is drawn out and the key slipped over the square surface of the sleeve and the pin inserted in the hole in the knob-rod'to prevent the key from slipping'. When the key is removed the knob-rod is dra-Wn in by the spiral spring', pressing' the outside knob closely against the door, thus closing' and protecting' the opening where the key is inserted, :1nd presenting the appearance of an ordinary doorknob.

Having thus fully described my invention, what I claim therein as new, and desire to secure by Letters Patent, is-

1. The keys R 1t, constructed to t over the end of sleeve D and provided with a pin, c to t the hole C of the. knob-rod, substantially as 

